Allentown, Pa. [1922]. map : col. ; on sheets 64 x 54 cm. Oriented with north slightly to the right; Set follows standard Sanborn color-coding; Maps Library set is incomplete; Maps Library copy is encapsulated; Maps Library has duplicates of sheets 117 and 121-127. Scale approximately 1:600. 50 ft. to an in. unless otherwise noted on individual sheets.